CN105731838B - A kind of calciner and method that light calcined magnesia is prepared with giobertite - Google Patents
A kind of calciner and method that light calcined magnesia is prepared with giobertite Download PDFInfo
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- CN105731838B CN105731838B CN201610264984.3A CN201610264984A CN105731838B CN 105731838 B CN105731838 B CN 105731838B CN 201610264984 A CN201610264984 A CN 201610264984A CN 105731838 B CN105731838 B CN 105731838B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
A kind of calciner and method that light calcined magnesia is prepared with giobertite, belong to magnesia refractories technical field, the device includes the grey change feeding unit of preheating unit, roasting unit, cooling unit, dust removing units, kiln, fuel element and control unit, in the device, kiln ash change feeding unit is directly connected with roasting unit.The method for being prepared light calcined magnesia with giobertite using the device, is comprised the following steps：(1) preheat, giobertite is preheated；(2) roasting and dedusting, are calcined to giobertite, and the product in the middle of light calcined magnesia that obtain simultaneously, dedusting are carried out to the dust-laden exhaust gas of preheating unit；(3) cool down, obtain light calcined magnesia；(4) the grey feeding of kiln, kiln ash is fed directly into roasting unit.By the device and method of the present invention, light calcined magnesia is prepared, while production capacity is improved, automatization level and labor productivity is improved, the heat consumption of unit product is reduced again, while obtained light calcined magnesia has preferable activity.
Description
Technical field：
It is more particularly to a kind of to prepare light calcined magnesia with giobertite the invention belongs to magnesia refractories technical field
Calciner and method.
Background technology：
Light calcined magnesia is important strategic materials, and more than 10,000,000 tons of China's annual capacity is widely used in metallurgical, building materials
With the field such as flue gas desulfurization.
Giobertite, as a kind of important raw material of industry, according to the difference of content of MgO in giobertite, its purposes
Different, MgO=38.3~45.5%, makees desulfurizing agent and building and ornament materials are used；During MgO ＞ 45.5%, do high-grade magnesia
It is used for refractory material.Meanwhile, giobertite is also the important source material that roasting prepares light calcined magnesia, up to the present, China it is light
Burned magnesium oxide is calcined, and the overwhelming majority uses reflecting kiln technique.There is many deficiencies, reflecting kiln production Technology dress in this kind of technique
Standby to fall behind, single set production capacity is low, single set annual capacity only 6kt~10kt；Heat consumption is high, per t light calcined magnesias consumption standard coal
260kg；Dynamicization degree is low, continuous production is poor, generally using artificial loading, artificial discharging, vexed kiln, stifled kiln etc. often occurs existing
As；Seriously polluted, the dust content in stack gas of discharge is all in 700mg/Nm3More than；Labor productivity is low, and only 800t/ people a is left
It is right；The poor activity of obtained light calcined magnesia, the citric acid method reaction time is universal in more than 160s；Industrial concentration is poor, has
Only a set of production, many only 20 sets or so, the industry, which has been put on by Science and Technology Department of Liaoning Province, " lights a fire, smolders everywhere in village of village
The cap of " small, scattered, random ", it can be seen that, the degree of the backwardness of the industry.Therefore, how to improve magnesite industry technology and
Equipment, is one of important topic that each magnesite scientific worker faces.
The content of the invention：
There is provided one kind magnesite on roasting technology the invention aims to overcome the shortcomings of existing giobertite
The calciner and method of standby light calcined magnesia made of stones, improve single set system production capacity, improve automatization level, improve work production
Rate, increases the activity of magnesia unslacked, and energy-saving and emission-reduction improve Business Economic Benefit.
The calciner that light calcined magnesia is prepared with giobertite that the present invention is provided, including preheating unit, roasting unit,
The grey change feeding unit of cooling unit, dust removing units, kiln, fuel element and control unit；
Wherein, the roasting unit include feeding bin, kiln head cover, rotary kiln and kiln hood, the feeding bin, kiln head cover,
Rotary kiln is sequentially connected with kiln hood；The dust removing units contain air inlet, gas outlet and discharging opening；
The kiln hood connection of the preheating unit discharging opening and roasting unit, preheating unit gas outlet and dust removing units air inlet
Mouth connection, dust removing units discharging opening is connected with the grey change feeding unit charging aperture of kiln, and dust removing units gas outlet and atmosphere, kiln ash are fed
The kiln head cover of the feeding bin connection of material unit discharging opening and roasting unit, fuel element and roasting unit is connected, roasting unit
Kiln head cover is connected with cooling unit charging aperture, the grey change feeding unit of preheating unit, roasting unit, cooling unit, dust removing units, kiln,
Fuel element is connected with control unit respectively.
The preheating unit, including preheater and hydraulic oil unit, preheater are connected with hydraulic oil unit by liquid-filled pipe；
The ratio between rotary kiln length and cylinder interior diameter of the roasting unit are 1：(12~15), revolution be 0.3~
3.0rpm, gradient (sin α)=3.5%；
The fuel element, including primary air fan and burner, primary air fan are connected with burner by liquid-filled pipe；Institute
State burner and be provided with 4 nozzles, torch fuel is gaseous fuel or liquid fuel；
The cooling unit, including cooler and cooling blower, cooler are connected with cooling blower by liquid-filled pipe；
The dust removing units, including heat exchanger, sack cleaner, exhaust blower, cinder conveyer, valve and chimney, each part it
Between by liquid-filled pipe be connected；
By carrying between the grey change feeding unit of the kiln, including feed bin, valve, delivery pump, air blower and batcher, each part
Flow tube road is connected；The delivery pump is fuller pump, and the air blower is Roots blower；
Using the calciner that light calcined magnesia is prepared with giobertite, light calcined magnesia is prepared with giobertite
Method, this method comprises the following steps：
Step 1, preheat
By giobertite, preheated in preheating unit, giobertite temperature is 400~450 DEG C after preheating, resolution ratio is
10~20%, while producing dust-laden exhaust gas；Wherein, the thermal source of preheating unit is provided by roasting unit；
Step 2, while carrying out (1) and (2)：
(1) it is calcined
Giobertite after preheating enters in rotary kiln through kiln hood, is calcined, 60~90min of roasting time, is calcined
Product are rotated to kiln hood with rotary kiln in the middle of 900~950 DEG C of temperature, the light calcined magnesia of generation, and temperature is down to 750~800 DEG C；Its
In, roasting unit heat is provided by fuel element；
(2) dedusting
Dust-laden exhaust gas, into dust removing units, temperature is down to 140~160 DEG C, after removing dust purification, dusty gas after heat exchange
Air is discharged into, kiln ash enters the grey change feeding unit of kiln；
Step 3, cool down
Product, into cooling unit, are exchanged heat by kiln head cover in the middle of light calcined magnesia after roasting, obtain light-burned oxidation
Magnesium；Wherein, light calcined magnesia temperature is 100~200 DEG C；
Step 4, the grey feeding of kiln
By kiln ash, by the grey change feeding unit of kiln, into feeding bin, feed in kiln head cover, decomposed and be calcined, with step
Product enter step (3) together in the middle of light calcined magnesia in 2 (1).
In the step 1, the offer method of preheating unit thermal source：Thermal source, hot gas are provided by the hot gas of rotary kiln
Body enters preheater by kiln hood, and heat exchange is carried out with giobertite, and hot gas temperature is 600~650 DEG C, is produced after preheating
Dust-laden exhaust gas temperature be 250~300 DEG C, dust removing units are transported to by airduct；
In the step 1, MgO >=38.3% in giobertite；Granularity is 12~50mm；
In the step 2 (1), the fuel that fuel element is used is producer gas；
In the step 2 (2), heat exchange mode is：Dust-laden exhaust gas is exchanged heat with the water in heat exchanger；The dust separation
Mode, dust separation is carried out using sack cleaner；The dusty gas formed after dust separation, is discharged into greatly by exhaust blower through chimney
Gas；Dustiness≤10mg/Nm of the dusty gas formed after the dust separation3；The kiln ash enters kiln ash through cinder conveyer and fed
Material unit；
In the step 3, light calcined magnesia heat exchange mode is to carry out countercurrent flow with the cooling wind that cooling blower is provided；
Cooling wind after the heat exchange, temperature is 500~550 DEG C, is passed through rotary kiln by kiln head cover, is used as the combustion-supporting sky of fuel element
Gas；
In the step 4, kiln ash blows the feeding bin to roasting unit through delivery pump after metering, feeds kiln head cover.
Compared with prior art, the advantage of the invention is that：
1st, single set production capacity is greatly improved, heat consumption reduction.After the kiln ash metering come by the grey change feeding unit of kiln, feeding is turned round
Kiln is shaken the head in cover and decomposes rapidly and be calcined, and so can both increase the production capacity of rotary kiln 5~10%, reaches single set production capacity
To 620kt/a (2000t/d)；Meanwhile, the heat consumption of unit product is reduced again, and 170kg standards are only consumed per t light calcined magnesias consumption
Coal, 90kg standard coals/t products are saved than reflecting kiln；
2nd, pollution is reduced.The dust content in stack gas of discharge is all in 10mg/Nm3Below；
3rd, light calcined magnesia is active good.The citric acid method reaction time≤90s；
4th, automaticity is high.Labor productivity more than 15000t for each person every year.
Brief description of the drawings：
Fig. 1 be the embodiment of the present invention in the calciner that light calcined magnesia is prepared with giobertite structure principle chart；
Wherein, A- giobertites, B- light calcined magnesias, C- fuel, D- water；1 preheating unit, 1-1 preheaters, 1-2 hydraulic oil units；2 roastings
Burn unit, 2-1 kiln hoods, 2-2 kiln head covers, 2-3 feeding bins, 2-4 rotary kilns；3 cooling units；3-1 cooling blowers, 3-2 coolings
Device；4 dust removing units；5 kilns ash change feeding unit；6 fuel elements, 6-1 burners, 6-2 primary air fans；
Fig. 2 be the embodiment of the present invention in the method that light calcined magnesia is prepared with giobertite process chart；Wherein,
E- hot gas, wind is cooled down after F- heat exchange.
Embodiment：
With reference to embodiment, the present invention is described in further detail.
In the present embodiment, MgO >=38.3% in giobertite A, granularity is 12~50mm；
The capital equipment of device in the present embodiment, from purchased in market：
Preheater：φ10×16.5m
Rotary kiln：φ4×58m
Cooler：4×4×7.6m；Cooling blower：Q=40500m3/ h, P=11.5kPa
Sack cleaner：Total filter area is 5500m2；Exhaust blower Q=195000m3/ h, P=11.5kPa
Fuller pump：Qmax.=8t/h
Burner：Caloric value q=252MJ/h
The device of the said equipment composition produces light calcined magnesia 310kt per year.
Embodiment 1
As shown in figure 1, the calciner of light calcined magnesia is prepared with giobertite A, including preheating unit 1, roasting unit
2nd, the grey change feeding unit 5 of cooling unit 3, dust removing units 4, kiln, fuel element 6 and control unit；
Wherein, roasting unit 2 include feeding bin 2-3, kiln head cover 2-2, rotary kiln 2-4 and kiln hood 2-1, feeding bin 2-3,
Kiln head cover 2-2, rotary kiln 2-4 and kiln hood 2-1 are sequentially connected；Dust removing units 4 contain air inlet, gas outlet and discharging opening；
The discharging opening of preheating unit 1 is connected with the kiln hood 2-1 of roasting unit 2, the gas outlet of preheating unit 1 and dust removing units 4
Air inlet is connected, and the discharging opening of dust removing units 4 is connected with the grey charging aperture of change feeding unit 5 of kiln, and the gas outlet of dust removing units 4 connects with air
Logical, the kiln ash discharging opening of change feeding unit 5 is connected with the feeding bin 2-3 of roasting unit 2, the kiln head cover of fuel element 6 and roasting unit 2
2-2 connections, the kiln head cover 2-2 of roasting unit 2 is connected with the charging aperture of cooling unit 3, and preheating unit 1, roasting unit 2, cooling are single
The grey change feeding unit 5 of member 3, dust removing units 4, kiln, fuel element 6 are connected with control unit respectively.
Preheating unit 1, including preheater 1-1 and hydraulic oil unit 1-2, preheater 1-1 and hydraulic oil unit 1-2 pass through current-carrying tube
Road is connected；
The ratio between rotary kiln length and cylinder interior diameter of roasting unit 2 are 1：(12~15), revolution is 0.3~3.0rpm,
Gradient (sin α)=3.5%；
Fuel element 6, including primary air fan 6-2 and burner 6-1, primary air fan 6-2 and burner 6-1 pass through current-carrying tube
Road is connected, and burner 6-1 is provided with 4 nozzles, and the fuel used C of burner 6-1 are gaseous fuel or liquid fuel；
Cooling unit 3, including cooler 3-2 and cooling blower 3-1, cooler 3-2 and cooling blower 3-1 pass through current-carrying tube
Road is connected；
Lead between dust removing units 4, including heat exchanger, sack cleaner, exhaust blower, cinder conveyer, valve and chimney, each part
Liquid-filled pipe is crossed to be connected；
Pass through current-carrying between kiln ash change feeding unit 5, including feed bin, valve, delivery pump, air blower and batcher, each part
Pipeline is connected；Delivery pump is fuller pump, and air blower is Roots blower；
Using the calciner that light calcined magnesia is prepared with giobertite, the side of light calcined magnesia is prepared with giobertite
Method, this method process chart is as shown in Fig. 2 this method comprises the following steps：
Step 1, preheat
600 DEG C of hot gas E of rotary kiln 2-4 kiln tails enters preheater 1-1 by kiln hood 2-1, passes through heat exchange pair
Giobertite A is preheated；Giobertite A temperature is 400 DEG C after preheating, and resolution ratio is 10%, while it is 250 DEG C to produce temperature
Dust-laden exhaust gas, dust removing units 4 are transported to by airduct；
Step 2, while carrying out (1) and (2)：
(1) it is calcined
Giobertite A after preheating enters in rotary kiln 2-4 through kiln hood 2-1, is calcined, roasting time 60min, roasts
Burn product in the middle of 900 DEG C of temperature, the light calcined magnesia of generation to rotate to kiln hood with rotary kiln 2-4, temperature is down to 750 DEG C；Wherein, roast
Burn the heat of unit 2 to be provided by fuel element 6, the fuel B used is producer gas；
(2) dedusting
Dust-laden exhaust gas, into dust removing units 4, is exchanged heat, temperature is down to 140 DEG C after heat exchange, through sack cleaner with water D
After dust separation, dusty gas dustiness≤10mg/Nm3, air is discharged into through chimney by exhaust blower, kiln ash enters kiln through cinder conveyer
Grey change feeding unit 5；
Step 3, cool down
Product are by kiln head cover 2-2 in the middle of light calcined magnesia after roasting, into the cooler 3-2 of cooling unit 3, with cooling blower
The cooling wind that 3-1 is provided carries out countercurrent flow, obtains the light calcined magnesia B that temperature is 100 DEG C, and the temperature after heat exchange is 500 DEG C
Cooling wind F, rotary kiln 2-4 is passed through by kiln head cover 2-2, the combustion air of fuel element is used as；
Step 4, the grey feeding of kiln
Kiln ash is blowed through fuller pump to feeding bin 2-3 after metering, is fed kiln head cover 2-2, is decomposed and be calcined, with
Product enter step (3) together in the middle of light calcined magnesia in step 2 (1).
Light calcined magnesia made from the present embodiment, to its activity test, through citric acid method measure the reaction time≤
90s。
Embodiment 2
The device be the same as Example 1 that the present embodiment is used.
Using the calciner that light calcined magnesia is prepared with giobertite, the side of light calcined magnesia is prepared with giobertite
Method, this method process chart is as shown in Fig. 2 this method comprises the following steps：
Step 1, preheat
620 DEG C of hot gas E of rotary kiln 2-4 kiln tails enters preheater 1-1 by kiln hood 2-1, passes through heat exchange pair
Giobertite A is preheated；Giobertite A temperature is 410 DEG C after preheating, and resolution ratio is 12%, while it is 260 DEG C to produce temperature
Dust-laden exhaust gas, dust removing units 4 are transported to by airduct；
Step 2, while carrying out (1) and (2)：
(1) it is calcined
Giobertite A after preheating enters in rotary kiln 2-4 through kiln hood 2-1, is calcined, roasting time 70min, roasts
Burn product in the middle of 920 DEG C of temperature, the light calcined magnesia of generation to rotate to kiln hood with rotary kiln 2-4, temperature is down to 760 DEG C；Wherein, roast
Burn the heat of unit 2 to be provided by fuel element 6, the fuel B used is producer gas；
(2) dedusting
Dust-laden exhaust gas, into dust removing units 4, is exchanged heat with water, and temperature is down to 145 DEG C after heat exchange, through sack cleaner
After dust separation, dusty gas dustiness≤10mg/Nm3, air is discharged into through chimney by exhaust blower, kiln ash enters kiln through cinder conveyer
Grey change feeding unit 5；
Step 3, cool down
Product are by kiln head cover 2-2 in the middle of light calcined magnesia after roasting, into the cooler 3-2 of cooling unit 3, with cooling blower
The cooling wind that 3-1 is provided carries out countercurrent flow, obtains the light calcined magnesia B that temperature is 130 DEG C, and the temperature after heat exchange is 520 DEG C
Cooling wind F, rotary kiln 2-4 is passed through by kiln head cover 2-2, the combustion air of fuel element is used as；
Step 4, the grey feeding of kiln
Kiln ash is blowed through fuller pump to feeding bin 2-3 after metering, is fed kiln head cover 2-2, is decomposed and be calcined, with
Product enter step (3) together in the middle of light calcined magnesia in step 2 (1).
Light calcined magnesia made from the present embodiment, to its activity test, through citric acid method measure the reaction time≤
90s。
Embodiment 3
The device be the same as Example 1 that the present embodiment is used.
Using the calciner that light calcined magnesia is prepared with giobertite, the side of light calcined magnesia is prepared with giobertite
Method, this method process chart is as shown in Fig. 2 this method comprises the following steps：
Step 1, preheat
640 DEG C of hot gas E of rotary kiln 2-4 kiln tails enters preheater 1-1 by kiln hood 2-1, passes through heat exchange pair
Giobertite A is preheated；Giobertite A temperature is 430 DEG C after preheating, and resolution ratio is 15%, while it is 280 DEG C to produce temperature
Dust-laden exhaust gas, dust removing units 4 are transported to by airduct；
Step 2, while carrying out (1) and (2)：
(1) it is calcined
Giobertite A after preheating enters in rotary kiln 2-4 through kiln hood 2-1, is calcined, roasting time 80min, roasts
Burn product in the middle of 940 DEG C of temperature, the light calcined magnesia of generation to rotate to kiln hood with rotary kiln 2-4, temperature is down to 780 DEG C；Wherein, roast
Burn the heat of unit 2 to be provided by fuel element 6, the fuel B used is liquid fuel；
(2) dedusting
Dust-laden exhaust gas, into dust removing units 4, is exchanged heat with water, and temperature is down to 150 DEG C after heat exchange, through sack cleaner
After dust separation, dusty gas dustiness≤10mg/Nm3, air is discharged into through chimney by exhaust blower, kiln ash enters kiln through cinder conveyer
Grey change feeding unit 5；
Step 3, cool down
Product are by kiln head cover 2-2 in the middle of light calcined magnesia after roasting, into the cooler 3-2 of cooling unit 3, with cooling blower
The cooling wind that 3-1 is provided carries out countercurrent flow, obtains the light calcined magnesia B that temperature is 160 DEG C, and the temperature after heat exchange is 540 DEG C
Cooling wind F, rotary kiln 2-4 is passed through by kiln head cover 2-2, the combustion air of fuel element is used as；
Step 4, the grey feeding of kiln
Kiln ash is blowed through fuller pump to feeding bin 2-3 after metering, is fed kiln head cover 2-2, is decomposed and be calcined, with
Product enter step (3) together in the middle of light calcined magnesia in step 2 (1).
Light calcined magnesia made from the present embodiment, to its activity test, through citric acid method measure the reaction time≤
90s。
Embodiment 4
The device be the same as Example 1 that the present embodiment is used.
Using the calciner that light calcined magnesia is prepared with giobertite, the side of light calcined magnesia is prepared with giobertite
Method, this method process chart is as shown in Fig. 2 this method comprises the following steps：
Step 1, preheat
650 DEG C of hot gas E of rotary kiln 2-4 kiln tails enters preheater 1-1 by kiln hood 2-1, passes through heat exchange pair
Giobertite A is preheated；Giobertite A temperature is 450 DEG C after preheating, and resolution ratio is 20%, while it is 300 DEG C to form temperature
Dust-laden exhaust gas, dust removing units 4 are transported to by airduct；
Step 2, while carrying out (1) and (2)：
(1) it is calcined
Giobertite A after preheating enters in rotary kiln 2-4 through kiln hood 2-1, is calcined, roasting time 90min, roasts
Burn product in the middle of 950 DEG C of temperature, the light calcined magnesia of generation to rotate to kiln hood with rotary kiln 2-4, temperature is down to 800 DEG C；Wherein, roast
Burn the heat of unit 2 to be provided by fuel element 6, the fuel B used is liquid fuel；
(2) dedusting
Dust-laden exhaust gas, into dust removing units 4, is exchanged heat with water, and temperature is down to 160 DEG C after heat exchange, through sack cleaner
After dust separation, dusty gas and kiln ash, dusty gas dustiness≤10mg/Nm are obtained3, it is discharged into greatly through chimney by exhaust blower
Gas, kiln ash enters the grey change feeding unit 5 of kiln through cinder conveyer；
Step 3, cool down
Product are by kiln head cover 2-2 in the middle of light calcined magnesia after roasting, into the cooler 3-2 of cooling unit 3, with cooling blower
The cooling wind that 3-1 is provided carries out countercurrent flow, obtains the light calcined magnesia B that temperature is 160 DEG C, and the temperature after heat exchange is 550 DEG C
Cooling wind F, rotary kiln 2-4 is passed through by kiln head cover 2-2, the combustion air of fuel element is used as；
Step 4, the grey feeding of kiln
Kiln ash is blowed through fuller pump to feeding bin 2-3 after metering, is fed kiln head cover 2-2, is decomposed and be calcined, with
Product enter step (3) together in the middle of light calcined magnesia in step 2 (1).
Light calcined magnesia made from the present embodiment, to its activity test, through citric acid method measure the reaction time≤
90s。
Claims (9)
1. a kind of calciner that light calcined magnesia is prepared with giobertite, it is characterised in that single including preheating unit, roasting
The grey change feeding unit of member, cooling unit, dust removing units, kiln, fuel element and control unit；Wherein, the roasting unit includes feeding
Feed bin, kiln head cover, rotary kiln and kiln hood, the feeding bin, kiln head cover, rotary kiln and kiln hood are sequentially connected；The dedusting
Unit contains air inlet, gas outlet and discharging opening；
The kiln hood connection of the preheating unit discharging opening and roasting unit, preheating unit gas outlet connects with dust removing units air inlet
Connect, dust removing units discharging opening is connected with the grey change feeding unit charging aperture of kiln, dust removing units gas outlet and atmosphere, kiln ash feeding list
The kiln head cover of the feeding bin connection of first discharging opening and roasting unit, fuel element and roasting unit is connected, the kiln hood of roasting unit
Cover is connected with cooling unit charging aperture, the grey change feeding unit of preheating unit, roasting unit, cooling unit, dust removing units, kiln, burning
Unit is connected with control unit respectively；
The preheating unit, including preheater and hydraulic oil unit, preheater are connected with hydraulic oil unit by liquid-filled pipe；
The rotary kiln revolution of the roasting unit is 0.3~3.0rpm, gradient sin α=3.5%；
The fuel element, including primary air fan and burner, primary air fan are connected with burner by liquid-filled pipe；
The cooling unit, including cooler and cooling blower, cooler are connected with cooling blower by liquid-filled pipe；
Lead between the dust removing units, including heat exchanger, sack cleaner, exhaust blower, cinder conveyer, valve and chimney, each part
Liquid-filled pipe is crossed to be connected；
Pass through current-carrying tube between the grey change feeding unit of the kiln, including feed bin, valve, delivery pump, air blower and batcher, each part
Road is connected.
2. a kind of calciner that light calcined magnesia is prepared with giobertite according to claim 1, it is characterised in that：Institute
State burner and be provided with 4 nozzles.
3. a kind of calciner that light calcined magnesia is prepared with giobertite according to claim 1, it is characterised in that：Institute
Delivery pump is stated for fuller pump.
4. using the calciner that light calcined magnesia is prepared with giobertite described in claim 1, prepared with giobertite light
The method of burned magnesium oxide, it is characterised in that this method comprises the following steps：
Step 1, preheat
By giobertite, preheated in preheating unit, after preheating giobertite temperature be 400~450 DEG C, resolution ratio be 10~
20%, while producing dust-laden exhaust gas；Wherein, the thermal source of preheating unit is provided by roasting unit；
Step 2, while carrying out (1) and (2)：
(1) it is calcined
Giobertite after preheating enters in rotary kiln through kiln hood, is calcined, 60~90min of roasting time, sintering temperature
900~950 DEG C, the light calcined magnesia centre product of generation are rotated to kiln hood with rotary kiln, and temperature is down to 750~800 DEG C；Wherein,
Roasting unit heat is provided by fuel element；
(2) dedusting
Dust-laden exhaust gas, into dust removing units, temperature is down to 140~160 DEG C after heat exchange, and after removing dust purification, dusty gas is discharged into
Air, kiln ash enters the grey change feeding unit of kiln；
Step 3, cool down
Product, into cooling unit, are exchanged heat by kiln head cover in the middle of light calcined magnesia after roasting, obtain light calcined magnesia；Its
In, light calcined magnesia temperature is 100~200 DEG C；
Step 4, the grey feeding of kiln
By kiln ash, by the grey change feeding unit of kiln, into feeding bin, feed in kiln head cover, decomposed and be calcined, with step 2 (1)
In light calcined magnesia in the middle of product together enter step (3).
5. the method according to claim 4 that light calcined magnesia is prepared with giobertite, it is characterised in that the step 1
In, the offer method of preheating unit thermal source：Thermal source is provided by the hot gas of rotary kiln, hot gas enters pre- by kiln hood
Hot device, heat exchange is carried out with giobertite, and hot gas temperature is 600~650 DEG C, and the dust-laden exhaust gas temperature produced after preheating is
250~300 DEG C, dust removing units are transported to by airduct.
6. the method according to claim 4 that light calcined magnesia is prepared with giobertite, it is characterised in that the step 1
In, MgO >=38.3% in giobertite；Granularity is 12~50mm.
7. the method according to claim 4 that light calcined magnesia is prepared with giobertite, it is characterised in that the step 2
(2) in, heat exchange mode is：Dust-laden exhaust gas is exchanged heat with the water in heat exchanger；The dust separation mode, using bag-type dusting
Device carries out dust separation；The dusty gas formed after dust separation, air is discharged into by exhaust blower through chimney；After the dust separation
Dustiness≤10mg/Nm of the dusty gas of formation3；The kiln ash enters the grey change feeding unit of kiln through cinder conveyer.
8. the method according to claim 4 that light calcined magnesia is prepared with giobertite, it is characterised in that the step 3
In, light calcined magnesia heat exchange mode is to carry out countercurrent flow with the cooling wind that cooling blower is provided；Cooling after the heat exchange
Wind, temperature is 500~550 DEG C, is passed through rotary kiln by kiln head cover, is used as the combustion air of fuel element.
9. the method according to claim 4 that light calcined magnesia is prepared with giobertite, it is characterised in that the step 4
In, kiln ash blows the feeding bin to roasting unit through delivery pump after metering, feeds kiln head cover.
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| CN108585556A (en) * | 2018-07-24 | 2018-09-28 | 沈阳鑫博工业技术股份有限公司 | A kind of system and device and method preparing more specification light calcined magnesias |
| CN109851241A (en) * | 2019-04-17 | 2019-06-07 | 鞍山市正大炉料有限公司 | A kind of device and method of low power consumption melting magnesite |
| CN110736344B (en) * | 2019-11-07 | 2021-08-03 | 营口金岱国际科技有限公司 | Suspension kiln combustion chamber for producing light-burned magnesia powder by taking natural gas as fuel |
| CN111018368B (en) * | 2019-12-11 | 2021-04-13 | 东北大学 | Production device and production method for preparing light calcined powder from magnesite |
| CN113443842B (en) * | 2021-08-17 | 2022-05-13 | 辽宁劲达华杰工程技术有限公司 | Light-burned magnesium production device and production method |
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| CN203683393U (en) * | 2014-01-22 | 2014-07-02 | 甘肃陇冠矿业有限公司 | Low-grade magnesite calcination system |
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